Improvement in let-off mechanism foe looms



No. 81,453. PATENTED AUG.- 25, 1868.

" 0. H. YOUNG.

LET-OFF MECHANISM FDR LOOMS.

TO ALL WHOM IT MAY coucnnm VI w 1 I d n/l The eta" ate trots t3 Mis a Mi, (flit/Editin CHARLES H". YOUNG, OF RIVER POINT,RHODE IS LAND.

Letters Patent No. 81,453, dated August 25, 1868.

IMPROVEMENT IN LET-OFF MECHANISM FOR L'OOMS.

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Be it known that I, CHARLES H. YOUNG, of River Point, in the county of-Kent, and State of lthode Island, have invented an Improved Let-Off Motion for Looms; and do hereby declare the following to be a full and correct description thereof, reference being bad to the accompanying drawings, making part of this specification, and to the ietters and numbers of reference marked thereon, similar letters and numbers being used in alli'the figures to denote the same part.

In these drawingsii Figured is an elevation of the end of a loom, showing the let-ofi mechanism.

Figure 2 is a view of the escapemcnt and wheel.

Figure 3 is a view of the same.

Figure 4 is a vertical section oi' the same, taken through in the direction of the red lincin fig. 1. i

. The nature of this invention consists in making a let-ofi' motion for a loom that shall not only allow the proper aurount of warp to be drawn off of the yarn-beam, as required, but also, when an extra strain is put upon the web by the shuttles getting caught inthe shed, to allow of the extra amouutof warp to be drawn off-by the action of the lathe, that may be necessary to prevent any 'dnmage'to the web by the shuttle.

The construction is as follows: i V

A is the end frame of the loom.

B is the yarn-beam in bearings at the back of the frame.' v p O is a gear-wheel fast on the end of the short shaft S,'on the other end of which isa small gear-wheel, which meshes into a larger wheel, 1;, on the yarn-beam. A small gear, t, is placed upon a stud just above the wheel C and meshes into it. The escapement-wheel is fast to the small gear, and has projections, r 9' 1', upon its feed, which projections do not reach to the centre of wheel, but stop short, so as to leavc a,-elcar space in the middle.

, F is the whip-roll, over which the warp passes from the yarn-beam to the harness. On the endoi this whip-roll is an arm, 1?, which holds the escapoment'Ji, the ends of which are made with dogs or projections, o 0,

(see fig. 4,) which extend in towards the wheel D, so as to pass between the projections 1- r1, and is so arranged that one oi the projections a will' be in between those marked t. 1-, when the other is outside of them, and

vice versa.

V is a weight that keeps a proper strain upon the whip-rollto keep the web taut.

llhe operation is as follows: p 7 As often as the warp becomes suiiiciently taut from the filling, it causes a motion of the whips-ell by pressin-gvupon the strip g. This motion vibrates the arm of tho' es'eapement, and, allows ateeth of the wheel D to escape, and this, by meansof the intermediate gcnrqvheels,letsasmall portion of the yarn oil? of the'beam. Thus it' will be seen that the amount of yarn let off is governed by the pressure of the lathe (or lay) upon the filling, that is, when the process of weaving is going on, but if the shuttle gets stopped in the shed, and the lathe beats against it, the extra strain upon the warp will cause the whip-roll to move-so far as to throw the arm of the escapemcnt inside of the projections on wheel 1), (see dotted lines in fig. 3,) and this leaves the wheel free to revolve, and 'nllows'thc warp tobo drawn freely from the yarn-beam, so as to prevent the.sh uttle caught in the web from doing any damage to it. v i

It"- it is necessary at any time to unroll or-rollup the yarn on the beam, by moving the cscapement-arm into the position shown by the dotted lines in fig. 3, the yarn-beam will be free to be moved by hand in either direction. 7

Having thus described my improved let-off motion, what I claim as my invention, and desire to secure by Letters Patent, 'isr i i The combination of the wheel 1) with the escapoment J, arranged so that the projections 0 a on the arms shall move clear of the projections r r on the wheel D, when any extra strain is thrown upon the warp, substantially as herein described andfor the purpose set forth. 7

CHARLES H. YOUNG.

Witnesses:

LEVI Johnson, Jonx' R. RICE. 

